Exception: EBNF::LL1::Lexer::Error

Inherits:
StandardError
  • Object
show all
Defined in:
lib/ebnf/ll1/lexer.rb

Overview

Raised for errors during lexical analysis.

Examples:

Raising a lexer error

raise EBNF::LL1::Lexer::Error.new(
  "invalid token '%' on line 10",
  :input => query, :token => '%', :lineno => 9)

See Also:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(message, options = {}) ⇒ Error

Initializes a new lexer error instance.

Parameters:

  • message (String, #to_s)
  • options (Hash{Symbol => Object}) (defaults to: {})

Options Hash (options):

  • :input (String) — default: nil
  • :token (String) — default: nil
  • :lineno (Integer) — default: nil 


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# File 'lib/ebnf/ll1/lexer.rb', line 518

def initialize(message, options = {})
  @input  = options[:input]
  @token  = options[:token]
  @lineno = options[:lineno]
  super(message.to_s)
end

Instance Attribute Details

#input ⇒ String (readonly)

The input string associated with the error.

Returns:

  • (String) 


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# File 'lib/ebnf/ll1/lexer.rb', line 496

def input
  @input
end

#lineno ⇒ Integer (readonly)

The line number where the error occurred.

Returns:

  • (Integer) 


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# File 'lib/ebnf/ll1/lexer.rb', line 508

def lineno
  @lineno
end

#token ⇒ String (readonly)

The invalid token which triggered the error.

Returns:

  • (String) 


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# File 'lib/ebnf/ll1/lexer.rb', line 502

def token
  @token
end